Method of and mechanism for extracting interconnecting threads between stitched books



March 21, 1933. Q Nsc 1.902285 METHOD OF AND MECHANISM FOR EXTRACTINGINTERCONNECTING THREADS BETWEEN STITCHED BOOKS Filed April 21, 1932 2Sheets-Sheet l March 21, 1933. Q sc n' 1,902,286

METHOD OF AND MECHANISM FOR EXTRAGTING INTERCONNECTING THREADS BETWEENSTITCHED BOOKS Filed April 21, 1952 2 Sheets-Sheet 2 Patented Mar. 21,1933 curiae stares PATENT orricr.

OSCAR KLEINSCHMIT,- OF LEIPZIG-PLAG'WITZ, GERMANY, ASSIGNOR 'JIOGECBRUDER BREHMER, OF LEIPZIG-PLAGWITZ, GERMANY, A LIMITED PARTNERSHIPGER- MANY I V 7 METHOD or AND MECHANISM non. nx'raacrme m rnncomvnorme'rrmnans I BETWEEN srrrcnnn nooxs Application filed April 21, 1932,Serial no. 606,747, and in Germany June 4, 19 1 The present inventionrelates to the extraction of the severed interconnecting threads meansfor performing this operation mechan ically and, if desired,automatically.

According to this invention the thread extraction is performed by meanswhereby the foremost stitched book of the book-pad is dis placedlaterally with relation to the remainder of the book-pad.

The book-pad may be produced in a bookstitching or book binding machineof any type suitable for this purpose and the manner of stitching thebook-pad and the severance of the threads to be extracted forms no partof the present invention. The severance of the threads may be achievedin any desired manner, e. g. mechanically as described in the copendingapplication of Andre Rivlois and Oskar Miiller, Serial No. 501,128,dated 9th December 1930.

One constructional embodiment of the present invention will now bedescribed by way of example and with reference to the accompanyingdrawings in which: I

ig. 1 shows in perspective view theforward end of the book-pad slidewayor trough of a book-stitching machine provided with book-displacing orthread extracting mechanism according to this invention and set in thenormal position.

Fig. 2 shows an 'elevational view of the mechanism with thebook-displacing mechanism actuated to displace the foremost book of thepad relatively to the remainder of the book-pad, and

Fig. 3 is a detail'view drawn to a larger scale showing the dispositionof the interconnected threads when they are severed and hang in adjacentstitch loops.

The continuously stitched book-pad 10' is progressed in the usual mannerduring the stitching thereof along the floor 11 of the slideway ortrough of a book-stitching machine so that assuming that the signaturefeeding and book-stitching mechanism to be positioned to the left orrear of the book-pad 10 as viewed in the drawing, the said bookpadtravels in the direction of the arrow A.

A side lay or fence 11a is adjustably mounted on the floor 11 to therighthand side thereof.

An auxiliary frame 12 provided with'bearmg brackets 13, 13a and attachedto the mainframe of the machine or forming part thereof extends abovethe forward end of the book-pad trough transversely. shown in thedrawings.

A shaft 14 also extending transversely of the book-pad trough isslidably and TOT/3t", ably journalled in the bearing brackets 13, 13a.The shaft 14 has rigidly mounted thereon, a downwardly extending arm 15which is preferably curved and carries a of amp or angle bracket 16adapted to engageathe outermost corner of the edge E of the foremostbook of the book-pad. The arm 15 is adjustably mounted on the shaft 14by means of a flanged, split boss and clamping screw, while the clamp orbracket 16 is pivotally secured to the lower extremity of the said arm.

The bearing bracket 13 has secured thereto a substantially horizontaloutwardly extending fin er or abutment 17 which is provided at its freeouter extremity with an angular recess18 adapted to receive the nose ofa retaining lug 19 which is rigidly mounted upon the correspondingextremity of the shaft 14.

A downwardly extending arm 20 keyed to the shaft 14 adjacent the furtherextremity thereof has secured thereto a helical tension spring 21 whichis anchored to the frame 12. The shaft 14 is thus urged to rotate aboutits longitudinal axis in the direction of the arrow D, Fig. 1, sothatnormally the nose of the lug 19 engages the horizontal, bearing surfaceof the recess 18 in the abutment 17, Fig. 1, and the clamp bracket 16held by the arm 15 is positioned substantially vertical ready to receivethe corner of the advancing book-pad.

A bent strip forming a further bracket 22 is secured to the frame 12 andextends therefrom to embrace the shaft 14 intermediate the length of thelatter. I I

. The bracket 22 forms a buffer or' abutment for a helical compressionspring 23 which embraces the shaft 14 and is compressed be tween theabutment 22 and a collar 24 mounted upon the shaft and pinned thereto.The

thereof as spring 23 tends to displace the shaft 1 1 longitudinally inthe direction of the arrow B, i. e., transversely of the book-pad andthus impart alimited lateral movement to the clamp or bracket 16.

This longitudinal movement of the shaft 14 and lateral movement of theclamp or bracket 16 normally is prevented by the position of the lug 19which abuts the vertical bearing face of. the recess 18 formed in thefin er or abutment 17.

K sleeve 25 loosely mounted on the shaft 14 and heldbetween thebossofthe lever 20 and a pinned collar 26 is provided with a downwardlyextending-bifurcated lug which. is slotted to receive a pivot bolt 27.The

bifurcated lug is adapted to receive the upper extremity of asubstantially vertical piv-' oted connecting rod 28 the connectiontherebetween beingmade in the form of a knuckle joint the pivotal bolt27 of which is given.

sufficient clearance in its bearing slots to accommodate the .arcuatepath of movement of the upper extremity of the said connecting rod.

The lower extremity of the connecting rod 28 carries a cam followerroller 29 which, when the connecting rod 28 isrocked about its pivotinthe direction of the arrow C, engages the cam face of arotatableactuating disc 30 mounted upon a. drive shaft 31. The latter isjournalled in the main frame of the machine and placed-in drivingconnection with the machine drive (not shown).

The operation of thisdevice is as follows:

The forwardly movingbook-pad 10 which is moved in known manner by thestitching; operations 'advancesin the direction of the arrow A and'theoutermost corner of the edge E of the foremost book engages the damperbracket 16; The interconnecting.threadsibetween the foremost books haveat this stage of the operation been severed invany desired manner andthe severedthreads'as;iszusual' hang in the loops: ofthe adjacentstitches as shown in Fig. 3; Duringthe continued stitch; ing of thebook-padi'the latter continues-t0 advance thus also movingiforwardthebracket 16. By thismovementofthe bracket 16 the shaft 14 isrotatedabout itslongitudinalaxis against the force of the spring 21 and thenose of the lug-.19 lifts clear of the recess 18 in the abutment 17.

Under the impulse of the compressing spring 23 the shaft 14 is displacedlongitudinally and so moves the arm 15 so that the clamp 16 and theforemost book held-thereby are displaced laterally in relation totheremainder of the book-pad as shown in Fig. 2; The remainder of thebook-pad is held: from lateral. displacement by the side layor fence11a.

' By this lateral movement the severed threads of the terminal: stitchesof the adjacent books or the idle stitches interposed .necting rod 28,which latter has been rocked about,,its pivot during the displacingmovement of the shaft 14, engages the cam surface of the disc 30 (.asshown in chain-dotted lines in Fig. 1). The disc 30, constantly revolvedby the shaft 31, rocks the connecting rod 28 to its normal position asshown in full lines in Fig. 1. V

In this-movement of the connecting rod 28 thesha ft 141's moved tothe.left to itsnormal position against the force ofthe spring 23,

and thenose of the lug 19 registers with the recess 18 in theabut-ment17 whereupon the spring 21 acts to rotate the shaft 14 againstits longitudinalaxis and so look the said shaft against displac'ngmovement by encountering thenose 19-with the vertical face of the recess18.

The mechanism is thus set. in the normal position of: rest untit engagedby the advancing book-pad, V

The above described embodimentof the invention has-been set forth merelyby way of example anditisnot desired to limit thereto the scope of; theinvention which-is defined in the appended claims.

Vhat I claim is 1. Means for; extracting;mechanically the severedinterconnected threads between adjacent books of a;continuouslystitchedbookpad, comprising a book-engaging device adaptedto-engage-the-foremost book of the bookrpad, and'means for displacingsaid device andthe-book engaged therebylaterally w-ith-yrelat-ion: tothe remainder of thebookpad. 7

2. Means for extractingv mechanically the severed interconnectedthreads-between adjacent books of a: continuously stitched bookpad,comprising a book-engaging device, means for contacting said" devicewith asection of the book-pad, and means for displac' severedinterconnected threads between adjacent books of a continuously stitchedbookpad, comprising a book-engag1ng device,

means for engaging said device with a section of Etll'lOVlIlg book-pad,means for d1s-.

means for engaging said device with a sec-r tion of a moving book-pad,means for allowing a limited displacement of said device inthe directionof movement of said book-pad, means for displacing said device and thebook-pad section engaged thereby transversely to the direction of travelof the remainder ofthe book-pad and meansfor utilizing the firstmentioned displacement of the device to control the transverse movementthereof.

6. Means for extracting mechanically the severed interconnected threadsbetween adjacent books of a continuously stitched bookpad, comprising abook-engaging device, means for engaging said device with a section of amoving book-pad, means for displacingsaid device and said book-padsection engaged thereby laterally with relation to the remainder of saidbook-pad, means for controlling the displacement of said device inaccordance with the movement of the said book-pad, and means forresetting the laterally displaced device in the initial position.

7. Means for extracting mechanically the severed interconnected threadsbetween adj acent books of a continuously stitched bookpad, comprising abook-engaging device, means for engaging said device with a section of amoving book-pad, means for allowing a limited displacement of saiddevice in the direction of movement of said bookpad, means fordisplacing said device and the book-pad section engaged therebytransversely to the direction of travel of the remainder of thebook-pad, means for utilizing the first mentioned displacement of thedevice to control the transverse movement thereof and means forresetting the laterally displaced device in the initial position.

8. In a book-stitching machine, a. bookpad slideway adapted to support amoving book-pad having the interconnecting threads of its adjacent bookssevered, a supporting member positioned above said slideway andextending transversely of said trough and moving book-pad, a pushermember supported by said supporting member, means for engaging saidpusher member with a section of the book-pad, means for displacing saidpusher member and book-pad section engaged thereby transversely of theremainder of the book-pad, meansfor controlling the displacement of saiddevice by the movement of the book-pad, and means for resetting saiddisplaced device in its initial position.

9. In a book-stitching machine, a bookpad slideway adapted to support amoving book-pad, means for supporting a shaft above said slideway andextending transversely thereof, a shaft slidably mounted in saidshaft-supporting means, a pusher member depending from said shaft, meansfor engaging said pusher member with a section of the moving book-pad,means for displacing said pusher member and book-pad section engagedthereby laterally with relation to the remainder vof the book-pad, andmeans for resetting said pusher member in its initial operativeposition.

10. In a book-stitching machine, a bookpad slideway adapted to support amoving boolcpad, means for supporting a shaft above said slideway andextending transversely thereof, a shaft slidably mounted in saidshaft-supporting means, a pusher member secured to said shaft, means foren aging said pusher member with a section of said bookpad, means fordisplacing said pusher member and book-pad section engaged therebytransversely of the remainder of said bookpad, means for timing thedisplacement of said pusher member, and means for resetting said pushermember in its initial operative position. a

11. In a book-stitching machine, a book pad slideway adapted to supporta moving book-pad, means for supporting a shaft above said slideway, ashaft slidably mounted in said supporting means'and extendingtransversely of said slideway and book-pad carried thereon, a pushermember adj ustably secured to said shaft, means for engaging said pushermember with a section of said bookpad, means, for displacing said pushermember and book-section engaged thereby later ally with relation to theremainder of the book-pad, means associated with said shaft for timingthe displacing movement of said pushermember, and means for resettingsaid pusher member in its initial operative position.

12. In a book-stitching machine, a bookpad slideway adapted to supportamoving book-pad, means for supporting a shaft above said slideway, ashaft slidably mounted in said supporting means and extendingtransversely of said slideway and book-pad carried thereon, a downwardlyextending arm adjustably secured to said shaft, a pusher memberpivotally mounted at the lower extremity of said arm and positioned toengage a section of the moving book-pad, means for holding said pushermember in engagement with said book-pad section, means for displacingsaid pusher member and bookpadeection engaged thereby laterally withrelation to the remainder of said book-pad, and means for resetting saidpusher in its initial operative position.

13. In a book-stitching machine, a bookpad slideway adapted to support amoving bookpad, means for supporting a shaft above said slideway, ashaft slidably mounted in said shaft-supporting means and extendingtransversely of said slideWa-y and book-pad carried thereon, a pushermember adj ustably secured to said shaft, means for engaging said pushermember With a section of said moving book-pad, a helical compressionspring carried by said shaft and adapted to' displ'ace'said shaft andpusher member secured thereto laterally with relation to the remainderof the book-pachand means for resetting said pusher member in itsinitial operative position.

14. In a book-stitching machine, a bookpad slideWay adapted to support amoving book-pad, means for supporting a shaft above said slideway, ashaft rotatably and: slidably mounted in said shaftsupporting means,

means for dlsplacing said shaft transversely of the moving book-pad, astationary abutment, a. finger carried by said shaft and adaptednormally to engage said abutment and hold said shaft againstdisplacement, a pusher member secured to said shaft and positioned toengage a section of the moving book-pad and be carried forwardtherewith,

so that said shaft is rotated about its axis to disengage said lug fromsaid abutment thus permitting the lateral displacement of said shaft andsaid pusher member carried thereby, and means for resetting said shaftand said pusher member in the initial operative position.

15. In a book-stitching machine, a bookpad slideway adapted to support amoving book-pad, means for supporting a shaft above said slideway, ashaft slidably mounted in sa'idsupporting means and extendingtransversely of said slideway and book-pad ca-r-- ried thereon, a pushermember secured to said shaft, means for engaging said pusher member witha section of said book-pad, meansfor displacing said shaft and pushermember carried thereby transversely of said a downwardly extending armadjustably secured to said shaft, arr-angle clamp pivotally mounted uponthe lower extremity of said arm-and positioned to engage a corner of theforemost book of the book-pad, a collar pinned to said shaftintermediate its length, a shoulder bracket securedto saidshaftsupporting means and embracing said shaft, a helical compressionspring embracing said shaft and confined between said collar and saidbracketto impart displacing movement to said shaft and said clam-pcarried thereby, a stationary abutment; adjacent said shaft, a lugcarried by said shaftand adapted normally to engage said abutment andthus withhold said shaft from displacement and undesired rotation, meansfor holding said clamp in engagement with the foremost book of saidmoving book-pad so that the said clamp is carried along a limiteddistance with said book-pad thus rotating said shaft and disengagingsaid lug from said abutment, a: pivotal lever linked to said shaft, acam follower carried by said lever, and a rotating cam disc adapted toengage said cam follower when'said shaft is displaced so that rockingmovement is imparted to said lever thus resetting said shaft and saidclamp 1n the initial operative posltion.

In testimony whereof I aflix' my signature.

OSCAR KLEINSCHMIT.v

